--- /dev/null
+#include "utils.hpp"
+#include "mstch/mstch.hpp"
+
+mstch::citer mstch::first_not_ws(mstch::citer begin, mstch::citer end) {
+ for (auto it = begin; it != end; ++it)
+ if (*it != ' ') return it;
+ return end;
+}
+
+mstch::citer mstch::first_not_ws(mstch::criter begin, mstch::criter end) {
+ for (auto rit = begin; rit != end; ++rit)
+ if (*rit != ' ') return --(rit.base());
+ return --(end.base());
+}
+
+mstch::criter mstch::reverse(mstch::citer it) {
+ return std::reverse_iterator<mstch::citer>(it);
+}
+
+std::string mstch::html_escape(const std::string& str) {
+ if (mstch::config::escape)
+ return mstch::config::escape(str);
+
+ std::string out;
+ citer start = str.begin();
+
+ auto add_escape = [&out, &start](const std::string& escaped, citer& it) {
+ out += std::string{start, it} + escaped;
+ start = it + 1;
+ };
+
+ for (auto it = str.begin(); it != str.end(); ++it)
+ switch (*it) {
+ case '&': add_escape("&", it); break;
+ case '\'': add_escape("'", it); break;
+ case '"': add_escape(""", it); break;
+ case '<': add_escape("<", it); break;
+ case '>': add_escape(">", it); break;
+ case '/': add_escape("/", it); break;
+ default: break;
+ }
+
+ return out + std::string{start, str.end()};
+}